目录
以树形来显示程序的菜单，可以更直观、更快捷地对窗体进行操作，而且树型菜单比菜单栏更加美观实用。
1.TreeView控件
TreeView控件又称为树控件，它可以为用户显示节点层次结构，而每个节点又可以包含子节点，包含子节点的节点叫父节点，其效果就像在Windows操作系统的Windows资源管理器功能的左窗口中显示文件和文件夹一样。TreeView控件的ExpandAll方法用来展开所有树节点，语法格式如下：
public void ExpandAll()TreeView控件经常用来设计Windows窗体的左侧导航菜单。
2.实例
本实例在制作以树形显示的程序界面时，主要用TreeView控件及其ExpandAll方法。
（1）Resources.Designer.cs
//------------------------------------------------------------------------------
// <auto-generated>
// 此代码由工具生成。
// 运行时版本:4.0.30319.42000
//
// 对此文件的更改可能会导致不正确的行为，并且如果
// 重新生成代码，这些更改将会丢失。
// </auto-generated>
//------------------------------------------------------------------------------
namespace _194.Properties {
using System;
/// <summary>
/// 一个强类型的资源类，用于查找本地化的字符串等。
/// </summary>
// 此类是由 StronglyTypedResourceBuilder
// 类通过类似于 ResGen 或 Visual Studio 的工具自动生成的。
// 若要添加或移除成员，请编辑 .ResX 文件，然后重新运行 ResGen
// (以 /str 作为命令选项)，或重新生成 VS 项目。
[global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
[global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
internal class Resources {
private static global::System.Resources.ResourceManager resourceMan;
private static global::System.Globalization.CultureInfo resourceCulture;
[global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
internal Resources() {
}
/// <summary>
/// 返回此类使用的缓存的 ResourceManager 实例。
/// </summary>
[global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
internal static global::System.Resources.ResourceManager ResourceManager {
get {
if (object.ReferenceEquals(resourceMan, null)) {
global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("_194.Properties.Resources", typeof(Resources).Assembly);
resourceMan = temp;
}
return resourceMan;
}
}
/// <summary>
/// 重写当前线程的 CurrentUICulture 属性，对
/// 使用此强类型资源类的所有资源查找执行重写。
/// </summary>
[global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
internal static global::System.Globalization.CultureInfo Culture {
get {
return resourceCulture;
}
set {
resourceCulture = value;
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 类型的本地化资源。
/// </summary>
internal static System.Drawing.Bitmap 上 {
get {
object obj = ResourceManager.GetObject("上", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
/// <summary>
/// 查找 System.Drawing.Bitmap 类型的本地化资源。
/// </summary>
internal static System.Drawing.Bitmap 右 {
get {
object obj = ResourceManager.GetObject("右", resourceCulture);
return ((System.Drawing.Bitmap)(obj));
}
}
}
}
（2）Form1.Designer.cs
namespace _194
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
TreeNode treeNode1 = new TreeNode("企业类型设置");
TreeNode treeNode2 = new TreeNode("企业性质设置");
TreeNode treeNode3 = new TreeNode("企业级别设置");
TreeNode treeNode4 = new TreeNode("企业资信设置");
TreeNode treeNode5 = new TreeNode("基础信息维护", new TreeNode[] { treeNode1, treeNode2, treeNode3, treeNode4 });
TreeNode treeNode6 = new TreeNode("客户信息");
TreeNode treeNode7 = new TreeNode("联系人信息");
TreeNode treeNode8 = new TreeNode("业务往来");
TreeNode treeNode9 = new TreeNode("客户信息维护", new TreeNode[] { treeNode6, treeNode7, treeNode8 });
TreeNode treeNode10 = new TreeNode("客户投诉");
TreeNode treeNode11 = new TreeNode("客户反馈");
TreeNode treeNode12 = new TreeNode("客户服务", new TreeNode[] { treeNode10, treeNode11 });
TreeNode treeNode13 = new TreeNode("联系人信息查询");
TreeNode treeNode14 = new TreeNode("客户信息查询");
TreeNode treeNode15 = new TreeNode("客户信息查询", new TreeNode[] { treeNode13, treeNode14 });
TreeNode treeNode16 = new TreeNode("客户信息报表");
TreeNode treeNode17 = new TreeNode("业务往来报表");
TreeNode treeNode18 = new TreeNode("联系人信息表");
TreeNode treeNode19 = new TreeNode("打印报表", new TreeNode[] { treeNode16, treeNode17, treeNode18 });
TreeNode treeNode20 = new TreeNode("调用Word");
TreeNode treeNode21 = new TreeNode("调用EXCEL");
TreeNode treeNode22 = new TreeNode("辅助工具", new TreeNode[] { treeNode20, treeNode21 });
menuStrip1 = new MenuStrip();
toolStripMenuItem2 = new ToolStripMenuItem();
toolStripMenuItem3 = new ToolStripMenuItem();
toolStripMenuItem4 = new ToolStripMenuItem();
toolStripMenuItem1 = new ToolStripMenuItem();
panel1 = new Panel();
splitContainer1 = new SplitContainer();
treeView1 = new TreeView();
pictureBox1 = new PictureBox();
menuStrip1.SuspendLayout();
((System.ComponentModel.ISupportInitialize)splitContainer1).BeginInit();
splitContainer1.Panel1.SuspendLayout();
splitContainer1.Panel2.SuspendLayout();
splitContainer1.SuspendLayout();
((System.ComponentModel.ISupportInitialize)pictureBox1).BeginInit();
SuspendLayout();
//
// menuStrip1
//
menuStrip1.Dock = DockStyle.None;
menuStrip1.Items.AddRange(new ToolStripItem[] { toolStripMenuItem2, toolStripMenuItem3, toolStripMenuItem4, toolStripMenuItem1 });
menuStrip1.Location = new Point(0, 0);
menuStrip1.Name = "menuStrip1";
menuStrip1.Size = new Size(352, 25);
menuStrip1.TabIndex = 0;
menuStrip1.Text = "menuStrip1";
//
// toolStripMenuItem2
//
toolStripMenuItem2.Name = "toolStripMenuItem2";
toolStripMenuItem2.Size = new Size(92, 21);
toolStripMenuItem2.Text = "客户信息维护";
//
// toolStripMenuItem3
//
toolStripMenuItem3.Name = "toolStripMenuItem3";
toolStripMenuItem3.Size = new Size(68, 21);
toolStripMenuItem3.Text = "客户服务";
//
// toolStripMenuItem4
//
toolStripMenuItem4.Name = "toolStripMenuItem4";
toolStripMenuItem4.Size = new Size(92, 21);
toolStripMenuItem4.Text = "客户信息查询";
//
// toolStripMenuItem1
//
toolStripMenuItem1.Name = "toolStripMenuItem1";
toolStripMenuItem1.Size = new Size(92, 21);
toolStripMenuItem1.Text = "基础信息查询";
//
// panel1
//
panel1.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
panel1.BackgroundImage = Properties.Resources.上;
panel1.BackgroundImageLayout = ImageLayout.Stretch;
panel1.Location = new Point(0, 28);
panel1.Name = "panel1";
panel1.Size = new Size(496, 40);
panel1.TabIndex = 1;
//
// splitContainer1
//
splitContainer1.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right;
splitContainer1.Location = new Point(0, 65);
splitContainer1.Name = "splitContainer1";
//
// splitContainer1.Panel1
//
splitContainer1.Panel1.Controls.Add(treeView1);
//
// splitContainer1.Panel2
//
splitContainer1.Panel2.BackgroundImageLayout = ImageLayout.Stretch;
splitContainer1.Panel2.Controls.Add(pictureBox1);
splitContainer1.Size = new Size(496, 282);
splitContainer1.SplitterDistance = 165;
splitContainer1.TabIndex = 2;
//
// treeView1
//
treeView1.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left;
treeView1.Location = new Point(0, 0);
treeView1.Name = "treeView1";
treeNode1.Name = "节点6";
treeNode1.Text = "企业类型设置";
treeNode2.Name = "节点7";
treeNode2.Text = "企业性质设置";
treeNode3.Name = "节点8";
treeNode3.Text = "企业级别设置";
treeNode4.Name = "节点9";
treeNode4.Text = "企业资信设置";
treeNode5.Name = "节点0";
treeNode5.Text = "基础信息维护";
treeNode6.Name = "节点10";
treeNode6.Text = "客户信息";
treeNode7.Name = "节点11";
treeNode7.Text = "联系人信息";
treeNode8.Name = "节点12";
treeNode8.Text = "业务往来";
treeNode9.Name = "节点1";
treeNode9.Text = "客户信息维护";
treeNode10.Name = "节点13";
treeNode10.Text = "客户投诉";
treeNode11.Name = "节点14";
treeNode11.Text = "客户反馈";
treeNode12.Name = "节点2";
treeNode12.Text = "客户服务";
treeNode13.Name = "节点15";
treeNode13.Text = "联系人信息查询";
treeNode14.Name = "节点16";
treeNode14.Text = "客户信息查询";
treeNode15.Name = "节点3";
treeNode15.Text = "客户信息查询";
treeNode16.Name = "节点17";
treeNode16.Text = "客户信息报表";
treeNode17.Name = "节点18";
treeNode17.Text = "业务往来报表";
treeNode18.Name = "节点19";
treeNode18.Text = "联系人信息表";
treeNode19.Name = "节点4";
treeNode19.Text = "打印报表";
treeNode20.Name = "节点20";
treeNode20.Text = "调用Word";
treeNode21.Name = "节点21";
treeNode21.Text = "调用EXCEL";
treeNode22.Name = "节点5";
treeNode22.Text = "辅助工具";
treeView1.Nodes.AddRange(new TreeNode[] { treeNode5, treeNode9, treeNode12, treeNode15, treeNode19, treeNode22 });
treeView1.Size = new Size(165, 282);
treeView1.TabIndex = 0;
//
// pictureBox1
//
pictureBox1.BackgroundImage = Properties.Resources.右;
pictureBox1.BackgroundImageLayout = ImageLayout.Stretch;
pictureBox1.Dock = DockStyle.Fill;
pictureBox1.Location = new Point(0, 0);
pictureBox1.Name = "pictureBox1";
pictureBox1.Size = new Size(327, 282);
pictureBox1.TabIndex = 0;
pictureBox1.TabStop = false;
//
// Form1
//
AutoScaleDimensions = new SizeF(7F, 17F);
AutoScaleMode = AutoScaleMode.Font;
ClientSize = new Size(497, 347);
Controls.Add(splitContainer1);
Controls.Add(panel1);
Controls.Add(menuStrip1);
MainMenuStrip = menuStrip1;
Name = "Form1";
Text = "Form1";
Load += Form1_Load;
menuStrip1.ResumeLayout(false);
menuStrip1.PerformLayout();
splitContainer1.Panel1.ResumeLayout(false);
splitContainer1.Panel2.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)splitContainer1).EndInit();
splitContainer1.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)pictureBox1).EndInit();
ResumeLayout(false);
PerformLayout();
}
#endregion
private MenuStrip menuStrip1;
private ToolStripMenuItem toolStripMenuItem1;
private ToolStripMenuItem toolStripMenuItem2;
private ToolStripMenuItem toolStripMenuItem3;
private ToolStripMenuItem toolStripMenuItem4;
private Panel panel1;
private SplitContainer splitContainer1;
private TreeView treeView1;
private PictureBox pictureBox1;
}
}
（3）Form1.cs
namespace _194
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
/// <summary>
/// 展开所有节点
/// </summary>
private void Form1_Load(object sender, EventArgs e)
{
treeView1.ExpandAll();
}
}
}
（4）生成效果
这是一个缺点，当拖拽窗体放大时，panel2里的图片不能stretch，请网友看到给一个修复的建议吧。
